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Saturday, April 19, 2014

When we declare a variable in JavaScript; if its declared with the var keyword it will be a local variable and if we omit the var key work it will be implicitly declared as the global variable. Developers are always careful on creating global variables.

Problem Background

Developers may accidentally declare global variable without their knowledge.

Solution

function funcationName() {

"use strict";

};

To avoid developers from creating global variable you can use strict mode as given below. .

Conclusion If we use strict method; when we debug we will get an exception on the line where we have declared global variables. See the screenshot below.

Wednesday, April 16, 2014

I had to set opacity value for a text using cascading style (CSS). But when I type opacity it showed “The property 'opacity' is not compatible with Internet Explorer 8.0” in Visual Studio. See the screen shot below.

Solution

To set the opacity value you have to set both opacity and a filter value; so that it will work for all browsers.